Laboratory apparatus



m 30, 1936. H, MORRISON 2,945,866

LABORATORY APPARATUS Filed May 3, 1935 F Lza Z.

R067? 07": Jfmr fifarrz'ayrf, 27 gm Patented June 30, 1936 UNITED STATESPATENT OFFICE 1 Claim.

This invention relates to improvements in laboratory apparatus and, moreespecially, a device adapted for use in a combustion carbon train (forthe determination of carbon in steels) ahead of the absorption tube(which absorbs the carbon dioxide) so that the gases will be dried andpurified before reaching such tube. My improved device may be referredto in the art as a combination zinc and drying tube and althoughespecially adapted for use in a combustion carbon train, it is evidentthat the same may be used in any case for the purpose of drying andpurifying gases.

Among the features of my invention is the provision of a device of thecharacter described that is durable, efficient and easily constructed.My device is also made so that it can be easily cleaned, inspected andrefilled. Another feature of my invention is the provision in a singlebottle of means for both drying and purifying gases.

By the use of my invention, the length of the combustion carbon traincan be shortened, one

set of connections can be eliminated and one tube is made to perform twofunctions heretofore ordinarily performed by two tubes.

Other features and advantages of my invention will appear more fully asI proceed with my specification.

In that form of device embodying the features of my invention shown inthe accompanying drawing Figure 1 is a view in side elevation; and Fig.2 is a vertical sectional view.

The combination zinc and drying tube is preferably made of annealedglass or Pyrex glass. As shown in the drawing, it includes a bottle l0provided with a neck l2 having a hole in one side thereof opening intoan outlet pipe I5. The bottle is provided with an inlet opening or tubeI l below the neck.

18 indicates a hollow stopper having a hole 20 adapted to register withthe hole l3 in the neck.

The stopper is provided with a depending tube l9 with its borecommunicating with the interior of the stopper. The stopper l8 has aground glass fit inside of the neck l2 of the bottle.

In the use of the device for drying and purifying gases, particularly asused in apparatus for determining the carbon dioxide content of furnacecombustion gases, 1 may place a suitable drying agent, for example,anhydrone, hydralo,

calcium chloride, or the like, as indicated by 3!] in the tube I9between the glass wool stoppers 2| and 22. After this tube has beenplaced in the bottle and the stopper l8 seated in the neck, the bottleoutside of the tube is filled with granulated zinc 23. In the use of thedevice, gases to 15 be dried and purified enter the bottle through theopening ll, flow first through the zinc and then upwardly through thedrying agent 30, leaving the bottle through the pipe l5.

While I have shown and described certain em bodiments of my invention,it is to be understood that it is capable of many modifications.Changes, therefore, in the construction and arrangement may be madewithout departing from the spirit and scope of the invention asdisclosed in the appended claim, in which it is my intention to claimall novelty inherent in my invention as broadly as permissible, in viewof the prior art.

What I claim as new, and desire to secure by Letters Patent, is:

A glass device of the character described, including a bottle having aneck with a hole in one side thereof, and provided with an inlet tubebelow the neck and of sufficient diameter to permit the easy insertionof powdered solid material therethrough; a ground hollow stopper havinga hole adapted to register with the hole in the neck; and a dependingtube carried by the stopper whose bore is of a size sufficient to hold adrying agent, said bore communicating with the interior of the stopper.

HARRY MORRISON.

